First Extended Service Corporation First Extended Service Corporation First Extended Service Corporation First Extended Service corp. denying claim due to wrong spark plug Dallas Texas

First Extended Service Corporation denied my claim to fix my 2002 mercury mountaineer. There was damage to the cylinder head from a blown spark plug. They say because I used Autolight spark plugs and the thread count is shorter than the Ford Recomended Motorcraft plugs, this caused the plug to be blown out damaging the #6 coil and the cylinder head.

After the inspector left the repair shop (GRAHAM AUTO MALL), A FORD certified mechanic looked at the spark plug that I had used and the one that was recomended. He informed me that the thread depth of a spark plug does not matter, the seat depth has to be the same and it was. Making this plug a compatible part.

Researching further I contacted Autolight. Hear I spoke with a very kind man who informed me that Autocraft manufactures the Motorcraft OEM plug for the factory for my car. He, also has informed me thread depth means nothing as long as seat depth is the same. Being as though the head in my vehicle has only 4 or 5 threads tapped into it, the extra threads sit in open air.


I had been speaking with a man from the legal department at first extended service corp. He continues to argue with me like he is a mechanic. I understand the thread depth is different. A blind man can see this. Thread depth does not matter. At this time he won't return my calls or answer my fax. He must know that I am right as well as the Ford mechanic and the Autolight engineer.


I will not give up on this legitamate claim. I have Ford certified mechanics backing me, as well as the spark plug engineer. Who will the judge believe? Them or scam artists sitting behind a desk?

Jessica
GALION, Ohio
U.S.A.